<!--
 * @: 
 * @Version: 1.0
 * @Autor: ziwei
 * @Date: 2022-03-11 10:30:31
 * @LastEditors: ziwei
 * @LastEditTime: 2022-03-11 10:30:32
-->
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>worker</title>
</head>
<body>
  <script>
    function start() {
      
    }
    function sum() {
      let total = 0
    }
  </script>
</body>
</html>